A light emitting element according to one embodiment can comprise: a first conductive semiconductor layer; an active layer on the first conductive semiconductor layer; a second conductive semiconductor layer on the active layer; a light-transmitting ohmic layer on the second conductive semiconductor layer; a first electrode electrically connected with the first conductive semiconductor layer; and a second electrode on the light-transmitting ohmic layer. The light emitting element can include two first sides facing each other, and two second sides facing each other. The width of the first side is greater than the width of the second side, and the first side and the second side can be perpendicular to each other. The distance between the first branch electrode and the second branch electrode is ⅙ to ½ of the width of the second side of either one thereof.
Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A light emitting device comprising: a first conductive semiconductor layer; an active layer on the first conductive semiconductor layer; a second conductive semiconductor layer on the active layer; a light-transmitting ohmic layer on the second conductive semiconductor layer; a first electrode electrically connected to the first conductive semiconductor layer; and a second electrode on the light-transmitting ohmic layer, wherein the first electrode includes a first pad electrode and a first branched electrode, and the second electrode includes a second pad electrode and a second branched electrode, wherein the light emitting device includes two first sides facing each other and two second sides facing each other, and a width of the first sides is greater than that of the second sides, and the first sides and the second sides are orthogonal to each other, and a distance between the first branched electrode and the second branched electrode is ⅙ to ½ of the width of any one of the second sides, wherein the first branched electrode is closest to one of the first sides, and the second branched electrode is closest to another one of the first sides, and wherein the width of any one of the second sides is 200 to 300 μm, and the distance between the first branched electrode and the second branched electrode is 50 to 150 μm.
This invention relates to a light emitting device, specifically a semiconductor light-emitting diode (LED) with an improved electrode structure for enhanced light extraction and electrical performance. The device addresses the challenge of balancing electrical conductivity and light emission efficiency in LEDs, where traditional electrode designs can block light output or create uneven current distribution. The LED includes a first conductive semiconductor layer, an active layer for light generation, and a second conductive semiconductor layer. A light-transmitting ohmic layer is deposited on the second conductive semiconductor layer to facilitate current spreading. The device has a rectangular shape with two longer first sides and two shorter second sides, where the width of the second sides is between 200 to 300 micrometers. The first and second electrodes are positioned on opposite edges of the device, each consisting of a pad electrode for external connection and a branched electrode extending toward the center. The branched electrodes are spaced 50 to 150 micrometers apart, which is ⅙ to ½ the width of the second sides. This configuration ensures uniform current distribution while minimizing light blockage, improving overall efficiency. The design is particularly suited for high-brightness LEDs where both electrical and optical performance are critical.
2. The light emitting device of claim 1 , wherein an area of an upper side of the light emitting device is 300,000 μm 2 or less, and the distance between the first branched electrode and the second branched electrode is 90 to 110 μm.
This invention relates to a compact light emitting device designed for high-density integration. The device addresses the challenge of achieving efficient light emission in small form factors while maintaining reliable electrical performance. The light emitting device includes a substrate, a first electrode, a second electrode, and a light emitting layer. The first electrode has a first branched electrode, and the second electrode has a second branched electrode. The light emitting layer is positioned between the first and second electrodes. The device is characterized by an upper surface area of 300,000 square micrometers or less, ensuring a compact footprint suitable for densely packed applications. The distance between the first and second branched electrodes is precisely controlled to be between 90 and 110 micrometers, optimizing electrical and optical performance. This configuration balances current distribution and light extraction efficiency while minimizing device size. The branched electrode design enhances uniformity in light emission and reduces resistance losses, making the device ideal for applications requiring high-resolution displays, micro-LEDs, or integrated photonics. The precise spacing between electrodes ensures consistent performance across manufacturing variations.
3. The light emitting device of claim 1 , wherein a second distance between the second branched electrode and an edge of the light emitting device is ⅙ to ¼ of the width of the second side, wherein the edge of the light emitting device is a nearest edge parallel to the second branched electrode.
This invention relates to a light emitting device with an improved electrode structure to enhance light extraction efficiency. The device addresses the problem of light loss due to absorption by electrodes, which reduces overall brightness and efficiency. The invention features a branched electrode design where a second branched electrode is positioned at a specific distance from the edge of the device. This distance is defined as ⅙ to ¼ of the width of the second side of the device, where the edge is the nearest parallel edge to the electrode. The branched electrode structure allows for better current distribution while minimizing light absorption, thereby improving light extraction. The device may also include a first branched electrode with a similar configuration, ensuring uniform light emission across the device. The precise positioning of the electrodes relative to the device edges optimizes light output by reducing shadowing effects and improving efficiency. This design is particularly useful in applications requiring high brightness and uniform illumination, such as displays, lighting systems, and optical sensors.
4. The light emitting device of claim 1 , wherein a second distance between the second branched electrode and an edge of the light emitting device is ⅙ to ⅕ of the width of the second side.
This invention relates to a light emitting device with an improved electrode structure to enhance light extraction efficiency. The device addresses the problem of light loss due to absorption by electrodes, which reduces overall brightness and energy efficiency. The invention features a branched electrode design that minimizes electrode coverage while maintaining electrical conductivity. The primary electrode is positioned along one side of the device, while a second branched electrode extends from an opposite side. The branching pattern ensures uniform current distribution across the light-emitting area. A key aspect is the precise spacing of the second branched electrode relative to the device edge, which is set to ⅙ to ⅕ of the width of the second side. This spacing optimizes light extraction by reducing shadowing effects while maintaining electrical performance. The branched design also allows for flexible scaling to different device sizes without compromising efficiency. The invention is particularly useful in applications requiring high brightness and uniform light emission, such as displays, lighting panels, and optical sensors. The electrode configuration balances electrical conductivity and optical transparency, addressing a critical limitation in conventional light emitting devices.
5. The light emitting device of claim 1 , wherein a thickness of the light-transmitting ohmic layer is 40 to 60 nm.
This invention relates to a light-emitting device, specifically a semiconductor light-emitting device such as a light-emitting diode (LED), designed to improve light extraction efficiency and electrical performance. The device includes a light-transmitting ohmic layer that facilitates current spreading while minimizing optical absorption. The ohmic layer is positioned between a semiconductor layer and a conductive contact layer, ensuring efficient charge injection into the semiconductor structure. The thickness of this light-transmitting ohmic layer is optimized to balance electrical conductivity and optical transparency, with a specified range of 40 to 60 nanometers. This thickness range ensures sufficient current spreading without excessive absorption of emitted light, thereby enhancing overall device efficiency. The ohmic layer is typically composed of a transparent conductive oxide (TCO) material, such as indium tin oxide (ITO), which provides both high transparency and low resistivity. The device may also include additional layers, such as a reflective layer or a current-blocking layer, to further improve performance. The invention addresses the challenge of achieving high light extraction efficiency in LEDs while maintaining low operating voltages and uniform current distribution.
6. The light emitting device of claim 2 , wherein the distance between the first branched electrode and the second branched electrode is 3/10 to 11/30 of the width of the width of the second side.
This invention relates to a light emitting device, specifically addressing the optimization of electrode spacing to improve performance. The device includes a substrate with a first side and a second side, where the second side has a defined width. A first branched electrode and a second branched electrode are positioned on the second side, with the distance between them being precisely controlled. The spacing between the electrodes is set to a range of 3/10 to 11/30 of the width of the second side. This configuration ensures efficient charge distribution and light emission while minimizing energy loss. The branched electrodes are designed to enhance uniformity and efficiency in the light emitting device, addressing issues such as uneven illumination or excessive power consumption. The invention focuses on optimizing the geometric relationship between the electrodes and the substrate to achieve balanced performance. The precise spacing range is critical for maintaining optimal electrical and optical properties, ensuring the device operates effectively under various conditions. This design is particularly useful in applications requiring high efficiency and consistent light output, such as displays or lighting systems.
7. The light emitting device of claim 1 , wherein the light emitting device is included in a light emitting device package comprising: a third electrode layer and a fourth electrode layer electrically coupled to the light emitting device; a package body portion provided on the third electrode layer and the fourth electrode layer, the package body portion having a cavity to receive the light emitting device; and a molding member having a phosphor and surrounding the light emitting device in the cavity of the package body portion.
A light emitting device package is designed to enhance light emission efficiency and reliability. The package includes a light emitting device, such as a semiconductor light emitting diode (LED), which is placed within a cavity formed in a package body portion. The package body portion is mounted on a third and fourth electrode layer, which provide electrical connections to the light emitting device. The light emitting device is encapsulated within a molding member containing a phosphor, which converts the emitted light into a desired wavelength. The phosphor-containing molding member surrounds the light emitting device within the cavity, ensuring uniform light distribution and protection. The package structure improves thermal dissipation and mechanical stability, while the phosphor integration allows for color tuning and enhanced optical performance. This design is particularly useful in applications requiring high brightness, color consistency, and long-term reliability, such as lighting systems and display backlights. The package's modular construction facilitates easy integration into larger optical systems.
8. The light emitting device of claim 1 , wherein the light emitting device is one of a plurality of light emitting devices included in a light emitting apparatus.
A light emitting apparatus includes multiple light emitting devices arranged to provide illumination. Each light emitting device comprises a light emitting element, such as a light-emitting diode (LED), and a reflective structure positioned to direct light emitted by the element. The reflective structure has a reflective surface with a curved profile, such as a parabolic or elliptical shape, to enhance light extraction efficiency and control the distribution of emitted light. The reflective structure may be formed from a material with high reflectivity, such as a metal or a reflective coating, and is positioned to surround at least a portion of the light emitting element. The apparatus may further include a substrate or housing to support the light emitting devices, along with electrical connections to power the devices. The arrangement of multiple light emitting devices in the apparatus allows for scalable illumination solutions, such as in lighting fixtures, displays, or other optical systems. The reflective structure improves light output and uniformity by reducing internal reflections and directing light outward, addressing inefficiencies in conventional light emitting devices.
9. The light emitting device of claim 1 , wherein the first electrode includes only one first branched electrode, and the second electrode includes only one second branched electrode.
A light emitting device is designed to improve efficiency and uniformity in light emission. The device includes a first electrode and a second electrode, each having a branched structure to distribute electrical current across a light-emitting layer. The first electrode has only one branched electrode, and the second electrode also has only one branched electrode. These branched electrodes are arranged to ensure uniform current distribution, reducing localized hot spots and enhancing overall light emission efficiency. The branched electrodes may be interconnected to form a grid-like pattern, optimizing electrical conductivity while maintaining structural simplicity. This design minimizes manufacturing complexity by reducing the number of branching points, making the device easier to fabricate while still achieving consistent light output. The light-emitting layer, positioned between the first and second electrodes, emits light when an electric current passes through it. The device is particularly useful in applications requiring uniform illumination, such as displays, lighting panels, or optical sensors, where efficiency and reliability are critical. The single-branched electrode configuration simplifies the device architecture while maintaining performance, making it a cost-effective solution for large-area lighting applications.
10. A light emitting device comprising: a first conductive semiconductor layer; an active layer on the first conductive semiconductor layer; a second conductive semiconductor layer on the active layer; a light-transmitting ohmic layer on the second conductive semiconductor layer; a first electrode electrically connected to the first conductive semiconductor layer; a second electrode on the light-transmitting ohmic layer; and an insulating layer on the light-transmitting ohmic layer, wherein the first electrode includes a first pad electrode and a first branched electrode, and the second electrode includes a second pad electrode and a second branched electrode, wherein the light emitting device includes two first sides facing each other and two second sides facing each other, and a width of the first sides is greater than that of the second sides, and the first sides and the second sides are orthogonal to each other, and a distance between the first branched electrode and the second branched electrode is ⅙ to ½ of the width of any one of the second sides, wherein the first branched electrode is closest to one of the first sides, and the second branched electrode is closest to another one of the first sides, wherein the first electrode includes a plurality of penetrating electrodes connected to the first branched electrode and electrically connected to the first conductive semiconductor layer through the insulating layer, and wherein the first electrode further comprises a first ohmic branched electrode in contact with the first conductive semiconductor layer under the plurality of penetrating electrodes.
This invention relates to a light emitting device, specifically a semiconductor light emitting diode (LED) with an improved electrode structure for enhanced light extraction and electrical performance. The device addresses the challenge of balancing electrical conductivity and light transmission in LEDs, particularly in rectangular or square chip designs where electrode placement can obstruct light emission. The LED includes a first conductive semiconductor layer, an active layer, and a second conductive semiconductor layer stacked sequentially. A light-transmitting ohmic layer is deposited on the second conductive semiconductor layer to facilitate current spreading while allowing light to pass through. The device has a rectangular shape with two longer first sides and two shorter second sides. A first electrode, connected to the first conductive semiconductor layer, includes a pad electrode and a branched electrode positioned near one of the first sides. A second electrode, on the light-transmitting ohmic layer, includes a pad electrode and a branched electrode near the opposite first side. The branched electrodes are spaced apart by a distance of ⅙ to ½ of the width of the second sides, optimizing current distribution and minimizing light blockage. The first electrode also includes penetrating electrodes that extend through an insulating layer to connect to the first conductive semiconductor layer, with an ohmic branched electrode beneath them for improved contact. This design ensures efficient current injection while maximizing light extraction through the top surface.
11. The light emitting device of claim 10 , wherein a first lateral width of any one of the penetrating electrodes electrically connected to the first conductive semiconductor layer is greater than a first distance between two adjacent first penetrating electrodes.
This invention relates to light emitting devices, specifically those with penetrating electrodes that improve electrical and thermal performance. The device includes a first conductive semiconductor layer, a second conductive semiconductor layer, and an active layer between them. The active layer emits light when current flows between the first and second conductive semiconductor layers. The device also includes penetrating electrodes that extend through the second conductive semiconductor layer and the active layer to electrically connect to the first conductive semiconductor layer. These penetrating electrodes reduce contact resistance and enhance current spreading, improving efficiency and reliability. A key feature is that the lateral width of any one of the penetrating electrodes connected to the first conductive semiconductor layer is greater than the distance between two adjacent penetrating electrodes. This configuration ensures sufficient electrical contact while maintaining optimal spacing to prevent short circuits or current crowding. The penetrating electrodes may be arranged in a periodic pattern, such as a grid or array, to uniformly distribute current across the device. The device may also include a reflective layer beneath the first conductive semiconductor layer to enhance light extraction efficiency. The penetrating electrodes can be formed using etching and deposition processes, ensuring precise control over their dimensions and placement. This design is particularly useful in high-power light emitting diodes (LEDs) where efficient current distribution and heat dissipation are critical.
12. The light emitting device of claim 10 , wherein an area of the light emitting device is 300,000 μm 2 or less, the width of the second side is 200 μm to 300 μm.
A compact light emitting device is designed to address the need for high-performance illumination in small form factors. The device includes a light emitting element with a total area of 300,000 square micrometers or less, ensuring efficient integration into miniaturized systems. The device features a second side with a width between 200 micrometers and 300 micrometers, optimizing light extraction and thermal management. The light emitting element is mounted on a substrate, which may include a reflective layer to enhance light output and a conductive layer for electrical connectivity. The substrate may also incorporate a heat dissipation structure to maintain operational stability. The device is encapsulated to protect the light emitting element while allowing light emission. The compact design enables applications in displays, sensors, and other space-constrained environments where high brightness and reliability are required. The precise dimensions ensure compatibility with microfabrication processes and integration into microelectronic systems.
13. The light emitting device of claim 12 , wherein the distance between the first branched electrode and the second branched electrode is 3/10 to 11/30 of the width of the width of the second side.
This invention relates to a light emitting device, specifically an organic light emitting diode (OLED) with an improved electrode structure to enhance light extraction efficiency. The device addresses the problem of low light extraction efficiency in conventional OLEDs, where a significant portion of emitted light is trapped within the device due to total internal reflection and waveguiding modes. The light emitting device includes a substrate, a first electrode, a second electrode, and an organic light emitting layer positioned between the electrodes. The second electrode has a branched structure with a first branched electrode and a second branched electrode extending from a main electrode body. The first and second branched electrodes are spaced apart by a distance that is 3/10 to 11/30 of the width of the second side of the second electrode. This specific spacing ratio optimizes light scattering and extraction by disrupting waveguiding modes, thereby increasing the outcoupling efficiency of the device. The branched electrodes may be arranged in a symmetrical or asymmetrical pattern to further enhance light extraction. The organic light emitting layer emits light when an electric current is applied between the first and second electrodes, and the branched electrode structure ensures more efficient light emission outward from the device. This design improves brightness and energy efficiency compared to conventional OLEDs with unbranched electrodes.
14. The light emitting device of claim 11 , wherein the first lateral width of any one of the penetrating electrodes electrically connected to the first conductive semiconductor layer is 2.5 times or more the first distance between the two adjacent first penetrating electrodes.
This invention relates to light emitting devices, specifically addressing the challenge of improving electrical and optical performance by optimizing the design of penetrating electrodes. The device includes a first conductive semiconductor layer, a second conductive semiconductor layer, and a light emitting layer positioned between them. Penetrating electrodes extend through the second conductive semiconductor layer to electrically connect to the first conductive semiconductor layer. The key innovation involves the spatial arrangement of these electrodes, where the lateral width of any one of the penetrating electrodes is at least 2.5 times the distance between two adjacent electrodes. This configuration enhances current spreading and reduces electrical resistance, improving overall device efficiency and reliability. The penetrating electrodes may be arranged in a grid or other patterned layout to further optimize light extraction and electrical performance. The device may also include additional features such as reflective layers or insulating layers to enhance functionality. The invention is particularly useful in high-power light emitting diodes (LEDs) where efficient current distribution and thermal management are critical.
15. The light emitting device of claim 14 , wherein the first lateral width of any one of the penetrating electrodes is 50 μm or more, and the first distance between the two adjacent first penetrating electrodes is about 20 μm.
This invention relates to a light emitting device with improved electrical and thermal performance. The device includes a substrate, a light emitting structure on the substrate, and a plurality of penetrating electrodes extending through the light emitting structure to electrically connect to the substrate. The penetrating electrodes have a first lateral width of at least 50 micrometers and are spaced apart by a first distance of approximately 20 micrometers. The penetrating electrodes are arranged in a grid pattern to enhance current spreading and heat dissipation. The light emitting structure includes a first conductivity-type semiconductor layer, an active layer, and a second conductivity-type semiconductor layer. The penetrating electrodes are electrically connected to the first conductivity-type semiconductor layer, while the second conductivity-type semiconductor layer is electrically connected to a second electrode on the opposite side of the light emitting structure. The device may also include a reflective layer to improve light extraction efficiency. The penetrating electrodes are designed to reduce contact resistance and improve thermal management, addressing issues of uneven current distribution and overheating in conventional light emitting devices. The specific dimensions of the penetrating electrodes and their spacing are optimized to balance electrical conductivity and thermal dissipation while maintaining structural integrity.
16. The light emitting device of claim 15 , wherein the first lateral width of any one of the penetrating electrodes is about 50 to 70 μm, and the first distance between the two adjacent first penetrating electrodes is about 15 to 25 μm.
This invention relates to a light emitting device with improved electrical and optical performance through optimized penetrating electrode design. The device addresses challenges in conventional light emitting structures where inefficient current spreading and high resistance degrade performance. The invention features a substrate with a plurality of penetrating electrodes extending through the substrate to electrically connect to a light emitting layer. Each penetrating electrode has a first lateral width of approximately 50 to 70 micrometers, and adjacent electrodes are spaced apart by a first distance of approximately 15 to 25 micrometers. This configuration enhances current distribution across the light emitting layer while maintaining structural integrity. The penetrating electrodes may be arranged in a grid pattern to further improve uniformity. The device may also include a reflective layer beneath the light emitting layer to redirect emitted light upward, increasing overall light extraction efficiency. The optimized dimensions of the penetrating electrodes balance electrical conductivity with thermal management, reducing resistive losses and heat generation. This design is particularly useful in high-power light emitting devices where efficient current spreading and thermal dissipation are critical.
17. The light emitting device of claim 10 , wherein a thickness of any one of the penetrating electrodes is greater a thickness of the first branched electrode.
Technical Summary: This invention relates to light emitting devices, specifically addressing the challenge of improving electrical conductivity and light extraction efficiency in such devices. The device includes a light emitting structure with multiple electrodes, including penetrating electrodes and branched electrodes. The penetrating electrodes extend through the light emitting structure to enhance electrical contact, while the branched electrodes distribute current more uniformly across the device. A key feature is that the thickness of any one of the penetrating electrodes is greater than the thickness of the first branched electrode. This design ensures robust electrical pathways while maintaining structural integrity and minimizing optical interference. The thicker penetrating electrodes improve current injection efficiency, reducing resistive losses and heat generation, while the thinner branched electrodes allow for finer current distribution without excessive material usage. The overall structure enhances both electrical performance and light extraction, making the device more efficient and reliable for applications such as displays, lighting, and optical communication. The invention focuses on optimizing electrode geometry to balance electrical and optical properties in light emitting devices.
18. The light emitting device of claim 10 , wherein the first electrode includes only one first branched electrode, and the second electrode includes only one second branched electrode.
This invention relates to light emitting devices, specifically addressing the need for improved electrode configurations to enhance performance and efficiency. The device includes a light emitting layer positioned between a first electrode and a second electrode. The first electrode has a branched structure with only one first branched electrode, and the second electrode has a branched structure with only one second branched electrode. These branched electrodes are designed to improve charge injection and distribution within the light emitting layer, leading to more uniform light emission and reduced power consumption. The branched electrodes may be arranged in a specific geometric pattern to optimize current flow and minimize resistive losses. The light emitting layer may be an organic material, such as an organic light emitting diode (OLED) layer, or another emissive material. The device may also include additional layers, such as hole injection layers, electron injection layers, or encapsulation layers, to further enhance performance. The invention aims to provide a more efficient and reliable light emitting device by simplifying the electrode structure while maintaining effective charge transport.
19. A light emitting device comprising: a first conductive semiconductor layer; an active layer on the first conductive semiconductor layer; a second conductive semiconductor layer on the active layer; a light-transmitting ohmic layer on the second conductive semiconductor layer; a first electrode electrically connected to the first conductive semiconductor layer; and a second electrode on the light-transmitting ohmic layer, wherein the first conductive semiconductor layer includes two first sides facing each other and two second sides facing each other, and a width of the first side is greater than that of the second side, and the first side and the second side are orthogonal to each other, wherein the first electrode includes a first pad electrode and a first branched electrode extended from the first pad, wherein the second electrode includes a second pad electrode and a second branched electrode extended from the second pad, wherein a distance between the first branched electrode and the second branched electrode is ⅙ to ½ of the width of any one of the second sides, wherein a distance between the second branched electrode and a nearest one of the first sides to the second branched electrode is ⅙ to ½ of the width of any one of the second sides, wherein the width of any one of the second sides is less than 300 μm, and wherein the distance between the first branched electrode and the second branched electrode is less than 110 μm.
This invention relates to a light-emitting device, specifically a semiconductor light-emitting diode (LED) with an improved electrode structure for enhanced light extraction and electrical performance. The device addresses the challenge of balancing electrical conductivity and light emission efficiency in LEDs, where traditional electrode designs can block light output or create uneven current distribution. The LED includes a first conductive semiconductor layer, an active layer, and a second conductive semiconductor layer stacked sequentially. A light-transmitting ohmic layer is deposited on the second conductive semiconductor layer to facilitate current spreading. The first conductive semiconductor layer has a rectangular or square shape with two longer first sides and two shorter second sides, where the second sides are orthogonal to the first sides. The width of the second sides is less than 300 μm, ensuring a compact design. The first electrode, connected to the first conductive semiconductor layer, consists of a pad electrode and branched electrodes extending from the pad. Similarly, the second electrode, placed on the light-transmitting ohmic layer, includes a pad electrode and branched electrodes. The branched electrodes of the first and second electrodes are spaced apart by a distance of ⅙ to ½ of the second side width, ensuring efficient current distribution while minimizing light blockage. Additionally, the distance between the second branched electrode and the nearest first side is also ⅙ to ½ of the second side width, optimizing light extraction. The spacing between the first and second branched electrodes is further constrained to be less than 110 μm, promoting uniform current flow and reducing resistive losses. This configuration improves both electrica
20. The light emitting device of claim 19 , wherein an area of the first conductive semiconductor layer is 300,000 μm 2 or less.
This invention relates to a light emitting device, specifically addressing the challenge of optimizing the size of conductive semiconductor layers to improve performance and efficiency. The device includes a first conductive semiconductor layer with a surface area of 300,000 square micrometers or less, which is designed to enhance light emission characteristics while maintaining structural integrity. The first conductive semiconductor layer is part of a larger semiconductor structure that may include additional layers, such as a second conductive semiconductor layer and an active layer positioned between them. The active layer is responsible for generating light when an electrical current is applied. The device may also feature a reflective layer to improve light extraction efficiency by redirecting emitted light outward. The first conductive semiconductor layer's reduced area helps minimize resistive losses and heat generation, leading to better overall device performance. This design is particularly useful in applications requiring compact, high-efficiency light sources, such as micro-LEDs or other miniaturized optoelectronic devices. The invention focuses on balancing size constraints with optical and electrical performance to achieve optimal light emission.
21. The light emitting device of claim 19 , wherein the width of any one of the second sides is 200 to 300 μm, and wherein the distance between the first branched electrode and the second branched electrode is less than 90 μm to 110 μm.
This invention relates to a light emitting device, specifically an organic light emitting diode (OLED) with an improved electrode structure to enhance light emission efficiency and uniformity. The device addresses the problem of uneven light distribution and low efficiency in conventional OLEDs, which often result from improper electrode spacing and design. The light emitting device includes a substrate, a first electrode layer, an organic light emitting layer, and a second electrode layer. The first electrode layer is divided into multiple first branched electrodes, while the second electrode layer is divided into multiple second branched electrodes. These branched electrodes are arranged in an interdigitated pattern to maximize the active emission area and minimize current crowding. The second branched electrodes have a width of 200 to 300 micrometers, ensuring optimal current distribution and heat dissipation. The distance between adjacent first and second branched electrodes is tightly controlled between 90 to 110 micrometers, which balances electrical resistance and light extraction efficiency. This precise spacing prevents short circuits while maintaining uniform light emission across the device. The interdigitated electrode design improves charge injection and recombination efficiency, leading to higher brightness and longer device lifespan. The invention is particularly useful in display panels and lighting applications where uniform and efficient light emission is critical.
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September 26, 2016
December 3, 2019
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